Attachment-plug.



PATENTED NOV. 27, 1906.

D. E. BOWN.v

ATTACHMENT PLUG.

APPLICATION FILED NOV. 1905.

INVENTOR narran Ashares artnr ortica.

ATTACHMENTGPLUG..

Specification of Letters Patent.

Patented Nov. 27, 190e.

Application filed November 6, 1905. Serial No. 285.976.

To all '1f/71,0772, it 771,053/ concern.'

Be it known that I, Dnvn) E. B'owN, a resident of Pittsburg, in thecounty of Alle gheny'and State of Pennsylvania, have invented a new anduseful Improvement in Attachment-Plugs, and I do hereby declare thefollowing to be a full, clear, .and exact description thereof.

My invention relates to attachment-plugs, and has special reference tosuoli plugs as are used in electric lighting.

The object of my invention is to provide an attachment-plug for thesockets of incandescent lamps in electric lighting, in which the partsforming such plug 'can be swiveled and attached or detached from eachother when desired, as well as such a plug as will be cheap and simplein its construction, will contain few parts, and will be capable ofbeing manufactured easily and assembled easily and rapidly.

To these ends my invention consists, generally stated, in the novelarrangement, construction, and combination of parts, as hereinafter morespecifically set forth and described, and particularly pointed out inthe claims.

To enable others skilled in the art to which my invention appertains toconstruct and use my improved attachment-plug, l will describe the samemore fully, referring to the accompanying drawings, in which- Figure 1is a longitudinal central section of my improved attachment-plug. Fig. 2is a like view of the same taken at right angles to that shown inFig. 1. Fig. 3 is a cross-section of the plug on the line 3 3, Fig. 1,and looking in the direction of the arrow. Fig. 4 is -a like view on theline 4 4, Fig. 1, and looking in the direction of the arrow.

Like symbols of reference herein indicate like parts in each of thefigures of the drawings.

As illustrated in the drawings, A re re sents my improvedattachment-plug, W `ch is composed of the main or body portion 1,preferably formed of porcelain, and the core or terminal-carryingportion 2, also preferably forrned of porcelain. The body portion 1 isprovided with the head 1 and shank 1, and extending centrally throughsaid head and into said shank is the chamber 3. The head 1 of the bodyportion 1 is preferably formed integral with the shank 1, and extendingarourrd the circumference of such head are a series of indentations 3-for con- 'v the same within said tube 2.

venience .in screwing and unscrewing the plug A into and from thelamp-socket. (Not shown.) Extending around the outer surface of theshank l of the body portion 1 arc screw-threads 4, with which ascrew-cap 5 is adapted to engage, and to one end of this screwcap 5 andadjacent to the head 1 on said body portion are connected spring-clips6, which extend through openings 6 in said shank 1 and into the chamber3 of said body portion. On the inner end portion 7 of the shank 1 onAsaid body 1 is a plate?, which is soldered to the outer face of said endand has a bolt 8 in said end, so that the inner headed end of said boltcan engage with the lower part of spring-clips 9 within said chamber andhold the same in place against said end 7.

The core or terminal-carrying portion 2 is formed of the tube 2 and isada tedto fit within the chamber 3 of the main or body portion 1, whilewithin said tube 2 is the division-wall 2, which extends from a pointwithin said tube and away from Vthe outer end thereof to a pointslightly below one end of the same and forms the passage-ways a andboneach side of One side of the tube 2 of the terminahcarrying portion 2is cut away, as at 2, and around the rejecting portion 2b of said tube,extending below the cut-away portion of the same, is a rib 10, on whichiits a ring 10 and which also fits around the outer face of thedivision-wall 2. A setscrew 11 asses through said ring 10 and engageswitii the outer face of the division-wall 2 to form a terminal for oneof the wires c, which passes through the passage-way a in the tube 2 andis connected in the usual manner at its inner end to said terminal 11.The inner end of the division-wall 2 has a U-shaped piece 12 fittingaround the same and is secured thereto by means of a setscrew 13, whichextends through an opening in one side of said U-shaped iece through an'opening in the end of said ivision-wall and engages with a threadedopening in the other side of the U-shaped piece to form a terminal forthe other wire d, passing through the passage-way b in said tube 2 andconnected 1n the usual manner at its inner end to said terminal.Extending out from the Ushaped piece 12 is a rounded or circular knob14, and this knob is adapted to fit within and between the spring-clips9 Within the chamber IOO 3 and projecting out from the end 7 of theshank 1".

The use and operation of my improved attachment-plug are as follows:After the wires c and d have been attached to the terminals 11 and 13,respectively, by running the saine through the passage-ways a and b inthe tube 2 of the terminal-carrying portion 2 such portion can then bepassed into the chamber 3 of the body portion 1 and in so doing the knob14 on the inner end of the division-wall 2 in said tube Will be sprunginto and iit within the spring-clips 9 on the end 7 of the shank l,while the ring 10 on the said tube and said division-Wall Will be sprunginto and it Within the spring-clips 6, extending Within said chamberfrom the spring-cap 5. When the terminal-carrying portion 2 1s thus inplace in the body ortion 1, the plug A is complete and can e inserted inthe usual manner within the lamp-socket, and when it is desired toWithdraw said portion from the body portion 1 for any purpose it caneasily be pulled out of said body portion with a slight pressure to freethe ring 10 vand knob 14 from the clips 6 and 9, respectively, and thencan be inserted back into place, as before described. When the plug A isbeing screwed to place within the lamp-socket or at any time thereafter,the terminal-carrying portion 2 can be swiveled on the body portion 1 ofsaid plug by said portion 2 turning around Within t-he body 1 by thering 10 and knob 14, moving around within the springclips 6 and 9,respectively.

It will thus be seen that my improved attachment-plug provides for aconvenient and eiiicient swiveled connection oi' the parts, so that itwill overcome any twisting of the wires when it is being placed withinthe lam socket or in its Withdrawal therefrom, while at the same timethe part carrying the terminals and wires can be readily detached fromthe body portion of the plug for any purpose desired and put back intoplace quickly and conveniently and without any e'ort or undue pressurebeing exercised with the same.

connections between said `body portion and.

terminal-carrying portion for the terminalcarrying portion to beswiveled upon and detached from said body ortion.

3. An attachment-pllilgcomprising a body portion, a terminal-carryingportion for it- 'I ting within said body portion, and springclips Withinsaid body portion engaging Wit-h said terminal-carrying portion for saidcarrying portion to be swlveled upon and detached from said bodyportion.

4. An attachment-plug comprising a body portion, a terminal-carryingportion for ,fitting within said body portion and having roundedportions thereon, and sprin -clips Within said body portion engaging witsaid rounded portions for said carrying portion to be swiveled upon anddetached from said body portion. p

5. An attachment-plug comprising a body portion having openings in thesame, a screwcap on said body portion, a terminalcarrying portion forfitting within said body portion and having rounded portions thereon,and spring-clips extending from said cap through said openings and fromthe end of said body portion engaging withsaid rounded portions for saidarrying portion to be swiveled upon and detached from said body portion.

in testimony whereof I, theusaid DAVID E.4

.BOWN, have hereunto set my hand.

DAVID E. BOWN.

Witnesses:

J. N. COOKE, R. H. AXTHELM.

